Remarks on Tachyon Driven Cosmology

Details Remarks on Tachyon Driven Cosmology Remarks on Tachyon Driven Cosmology

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005stc..conf...70s&link_type=abstract

STRING THEORY AND COSMOLOGY. Proceedings of Nobel Symposium 127. Held 14-19 August 2003 in Sigtuna, Sweden. Edited by U Danielss

Mathematics

Logic

Strings And Branes, Cosmology

Scientific paper

We begin by reviewing the results on the decay of unstable D-branes in type II string theory, and the open-closed string duality proposal that arises from these studies. We then apply this proposal to the study of tachyon driven cosmology, namely cosmological solutions describing the decay of unstable space filling D-branes. This naturally gives rise to a time reversal invariant bounce solution with positive spatial curvature. In the absence of a bulk cosmological constant the universe always begins with a big bang and ends in a big crunch. In the presence of a bulk cosmological constant one may get non-singular cosmological solutions for some special range of initial conditions on the tachyon.

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